Revert "test with naming StdLibs as zsp (zs package)"

This reverts commit 95d9aa2b32.

JavaIntegration/src/main/java/org/openzen/zencode/java/ScriptingEngine.java

 		space = new ModuleSpace(registry, new ArrayList<>(), StorageType.getStandard());
 		
 		try {
-			ZippedPackage stdlibs = new ZippedPackage(ScriptingEngine.class.getResourceAsStream("/StdLibs.zsp"));
+			ZippedPackage stdlibs = new ZippedPackage(ScriptingEngine.class.getResourceAsStream("/StdLibs.zip"));
 			SemanticModule stdlibModule = stdlibs.loadModule(space, "stdlib", null, new SemanticModule[0], FunctionParameter.NONE, stdlib);
 			stdlibModule = Validator.validate(stdlibModule, error -> System.out.println(error.toString()));
 			space.addModule("stdlib", stdlibModule);